1989-Mitsu-Factory Manual · mpi system · страница 4 из 48 · Открыть оригинал PDF ↗
| 1 symptom | Probable cause | Remedy |
|---|---|---|
| Engine will not start or starttoo hard (Cranks | Trouble in the MPI system | Check for output of self-diagnosis code. Read the code withavoltmetaror multLusetester(MB991307). |
| W | Malfunction of the fuel pump drive control system | perform cranking check with a multi-use tester (MB991 307).Check the fuel pump drive control sytsem and the fuel pump. |
| Malfunction of the ignition timing | Perform cranking check with a multi-use tester (MB991307). | |
| Malfunction of the power transistor | Check the power transistor as a single unit. | |
| Power is not supplied to the engine control unit. | Perform cranking check with a multi-use tester (MB991307). Check the power supply circuit. | |
| Malfunction of the control relay | Replace | |
| Malfunction of the injector | Perform cranking check with a multi-use tester (MB991 307). Check the injector drive circuit. Check the injector as a single unit. | |
| The fuel pressure is not proper. | Check thefuel pressure. | |
| Vacuum hose disconnected or damaged | Repair or replace | |
| Malfunction of the engine control unit. | Replace | |
| Wire breakage or short circuit occurs in the harness, orthe connector is improperly connected. | Repair or replace | |
| ?ough idle or engine itables | Trouble in the MPI system | Check for output of selfdiagnosis code Read the code with a voltmeter or multi-use tester (MB991307). |
| Malfunction of the sensor l lnake air temperature sensor l Engine coolant temperature sensor l Barometric pressure sensor l Ignition switch l Idle position switch l Throttle position sensor l Top dead center sensor, crank angle sensor l Power steering oil pressure switch l Air conditioner switch l Inhibitor switch l Air-flow sensor 0 Oxygen sensor | Check the sensor with a multi-use tester (MB991307). (Check the sensor-related circuit. Check the sensor as a single unit.) | |
| Malfunction of the engie control system 0 Stepper motor 0 Injector 0 Power transistor | Check the power supply circuit. Check the actuator with a multi-use tester (MB991307). | |
| Malfunction of thevehicle-speed reed switch | Check thevehicle speed reed switch. | |
| The fuel pressure is not proper. | Check the fuel pressure. | |
| Vacuum hose disconnected or damaged. | Repair or replace. | |
| Malfunction of the engine control unit. | Replace. | |
| Wire breakage or short circuit occurs in the harness, or the connector is improperly connected. | Repair or replace. |
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